Results 1 to 10 of about 144,564 (262)

Transform methods for testing the negative binomial hypothesis

open access: yesStatistica, 2007
We employ the empirical probability generating function in constructing a goodness-of-fit test for negative binomial distributions. The proposed tests, which are formed as weighted integrals, are shown to be consistent and their asymptotic null ...
Simos G. Meintanis
doaj   +1 more source

Estimation of Intracluster Correlation under the Negative Binomial Model [PDF]

open access: yesThe Egyptian Statistical Journal, 2012
Estimation of the Intracluster Correlation Coefficient (ICC) for the case of clustered count data is considered. Under the negative binomial model the method of moments estimators of both the dispersion parameter and the ICC are derived.
Marwa Abdel Gawad Ahmed
doaj   +1 more source

On the Accuracy of the Generalized Gamma Approximation to Generalized Negative Binomial Random Sums

open access: yesMathematics, 2021
We investigate the proximity in terms of zeta-structured metrics of generalized negative binomial random sums to generalized gamma distribution with the corresponding parameters, extending thus the zeta-structured estimates of the rate of convergence in ...
Irina Shevtsova, Mikhail Tselishchev
doaj   +1 more source

COVID-19 Mortality, Human Development, and Age Across the WHO Member States: A Longitudinal Multilevel Count Data Analysis

open access: yesComputers
This study aims to verify whether there is a statistically significant relationship between COVID-19 mortality rates, the Human Development Index (HDI), and population age across the World Health Organisation (WHO) member states.
José Clemente Jacinto Ferreira   +8 more
doaj   +1 more source

Negative Binomial Factor Analysis

open access: yesBehaviormetrika, 1999
A latent variable model for observed variables representing frequencies is proposed. The data type for the model is a subjects by variables two-way frequency table. The model has two groups of latent variables. The first group of latent variables represents the characteristics of subjects and corresponds to common factors in factor analysis.
openaire   +1 more source

A Modified Negative Binomial Distribution: Properties, Overdispersion and Underdispersion

open access: yesJournal of Statistical Theory and Applications (JSTA), 2019
In this paper, we introduce a new and useful discrete distribution (modified negative binomial distribution) and its statistical and probabilistic properties are discussed.
Ghobad Barmalzan   +2 more
doaj   +1 more source

Safety evaluation of urban roundabouts in India: a safety performance function-based approach

open access: yesTraffic Safety Research, 2022
There is a lack of comprehensive research in roundabout safety under non-lane-based traffic conditions, mainly due to the absence of relevant crash data and effective tools for safety evaluation.
V S Vinayaraj, Vedagiri Perumal
doaj   +1 more source

Spatial Distribution and Architecture of Acromyrmex landolti Forel (Hymenoptera, Formicidae) Nests in Pastures of Southwestern Bahia, Brazil

open access: yesSociobiology, 2013
Ants of the genera Atta and Acromyrmex (Myrmicinae: Attini) are in general pests for agricultural and pasture areas. In southwestern Bahia pastures, in Brazil, Acromyrmex landolti Forel occurs at intermediate densities of 260 nests ha-1.
Milton Rodrigues da Silva Júnior   +5 more
doaj   +3 more sources

Goodness-of-Fit Test for the Bivariate Negative Binomial Distribution

open access: yesAxioms
When modeling real-world data, we face the challenge of determining which probability distribution best represents the data. To address this intricate problem, we rely on goodness-of-fit tests.
Francisco Novoa-Muñoz   +1 more
doaj   +1 more source

Migraine day frequency in migraine prevention: longitudinal modelling approaches

open access: yesBMC Medical Research Methodology, 2019
Background Health economic models are critical tools to inform reimbursement agencies on health care interventions. Many clinical trials report outcomes using the frequency of an event over a set period of time, for example, the primary efficacy outcome ...
Gian Luca Di Tanna   +7 more
doaj   +1 more source

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